shadowfacts/fonttools
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

reworded glyph name section

Browse Source 
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@217 4cde692c-a291-49d1-8350-778aa11640f8
This commit is contained in:
jvr 2002-05-12 12:48:14 +00:00
parent b4bdd0f235
commit 7de32f2fb4
1 changed files with 11 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
Doc/index.html
View File

@ -99,23 +99,24 @@ than the command line programs described below.
makes the two above tools available under the Right Mouse Button. I haven't tested
these myself, but I'm very interested in hearing about the results!
<H3>Note about glyph names and TrueType GlyphID's</H3>
<H3>A note about glyph names and TrueType GlyphID's</H3>
TrueType fonts use glyph indices (GlyphID's) to refer to glyphs in most places.
While this is fine in binary form, it is really hard to work with for
humans. Therefore we use names instead.
<P>The names are derived from what is found in the 'post' table. It is
possible that different glyphs use the same PS name. If this happens, we
force the names to be unique by appending "#n" to the name (n being an
integer number). The original PS names will still be maintained by the
'post' table, so even though we use a different name internally, we are
still able to write the 'post' table back in original form. If there is
no proper 'post' table available, names will be derived from a Unicode
cmap (if available) in conjuction with the Adobe Glyph List (see fontTools/agl.py).
<P>The glyph names are either extracted from the 'CFF ' table or the 'post' table,
or are derived from a Unicode 'cmap' table. In the latter case the Adobe Glyph List
is used to calculate names based on Unicode values. If all of these mthods fail,
names are invented based on GlyphID (eg. "glyph00142").
<P>It is possible that different glyphs use the same name. If this happens,
we force the names to be unique by appending "#n" to the name (n being an
integer number). The original names are being kept, so this has no influence
on a "round tripped" font.
<P>Because the order in which glyphs are stored inside the TT font is
important, ttLib maintains an ordered list of glyph names in the font.
important, we maintain an ordered list of glyph names in the font.
<H3>Feedback</H3>